Post Number: 6
|Posted on Friday, April 01, 2011 - 01:29 am: ||
hello, Michael, we manufacture top quality roofing slate. belongs to hard slate. 7.275% sio2. So the absorption is 0.18%. and the surface is smooth.You can visit www.cnslate.com. Or send me email: email@example.com
Shanghai AD slate Co., Ltd
ASTM-S1/EN12326 T1 S1 A1
Roofing slate manufacturer.
|Posted on Thursday, February 26, 2004 - 11:34 am: ||
I am curious if there is a source for S1 Graded Pennsylvania Slate? I know there are several quarries in that state, but I am not aware that any of them produce anything but soft slate. Also, if there are veins like "Cathedral Grey" or "Albion Grey" why don't they simply produce the quality rock and skip the lesser quality slate veins? I would be interested in this slate if it was the quality of a good Vermont or Buckingham slate.